Aja or AJA may refer to:
In anthropology:
- Aja people, a people living in Benin
- Aja language (Niger-Congo), the language of the Aja people, part of the Gbe dialect continuum
- Aja (people of Sudan), an ethnic group living in Sudan
- Aja language (Nilo-Saharan), a language spoken in Sudan
In mythology
- Aja (Hindu mythology)
- Aja (Yoruba mythology)
In other uses:
- Aja (album), a 1977 Steely Dan album (and a song on the album)
- Aja Mountain, a mountain in Ha'il, Saudi Arabia
- AJ Auxerre, a French football club
- Al Jazeera Academy, an IB World School, Doha, Qatar
- American Jewish Archives
- American Journal of Archaeology
- The Association of Japanese Animations
- Ajaccio - Campo dell'Oro Airport's IATA airport code
- Arbeitskreis gemeinnütziger Jugendaustauschorganisationen, a German organisation of non-profit youth exchange groups
- The Australian Journalists Association, now part of the Media, Entertainment and Arts Alliance
Read more about Aja: People With The Name